XSL is a style sheet language for documents marked up using XML, the Extensible Markup Language, which can be thought of as "SGML for the Web." XSLT is used to describe how an XML source document is transformed into another XML document that uses the XSL formatting vocabulary. However, XSLT may be used for other general transforms as well. This exercise will deal with one of the most practical tasks for XSLT, transforming an XML document into an HTML document that can be viewed by any Web browser.

The World Wide Web Consortium (W3C) develops interoperable technologies (specifications, guidelines, software, and tools) to lead the Web to its full potential.